Problem Symptoms Table
WARNING: This page is about a different car, the 2007 Lexus SC 430. However, it is still accessible from the selected car via links, so may be relevant.
HINT:
- Use the table below to help determine the cause of the problem symptom. The potential causes of the symptoms are listed in order of probability in the "Suspected area" column of the table. Check each symptom by checking the suspected areas in the order they are listed. Replace parts as necessary.
- Inspect the fuses and relays related to this system before inspecting the suspected areas below.
Power tilt and power telescopic steering column system
SYMPTOM DESCRIPTION CHART
| Symptom | Suspected area | See |
|---|---|---|
| Both tilt and telescopic: Manual, auto away / return and memory functions do not operate, stop partway or do not stop | 1. Multiplex communication system | HOW TO PROCEED WITH TROUBLESHOOTING |
| 2. ECU power source circuit | DTC B2620 ECU Power Source Circuit Malfunction | |
| 3. Unlock warning switch circuit | DTC B2602 Key Unlock Warning Switch Circuit Malfunction | |
| 4. Tilt motor circuit | DTC B2610 Tilt Position Sensor or Tilt Motor Circuit Malfunction | |
| 5. Telescopic motor circuit | DTC B2611 Telescopic Position Sensor or Telescopic Motor Circuit Malfunction | |
| 6. Actuator power source circuit | ACTUATOR POWER SOURCE CIRCUIT | |
| Tilt only: Manual, auto away / return and memory functions do not operate, stop partway or do not stop | 1. Multiplex communication system | HOW TO PROCEED WITH TROUBLESHOOTING |
| 2. Tilt motor circuit | DTC B2610 Tilt Position Sensor or Tilt Motor Circuit Malfunction | |
| Telescopic only: Manual, auto away / return and memory functions do not operate, stop partway or do not stop | 1. Multiplex communication system | HOW TO PROCEED WITH TROUBLESHOOTING |
| 2. Telescopic motor circuit | DTC B2611 Telescopic Position Sensor or Telescopic Motor Circuit Malfunction | |
| Both tilt and telescopic: Only tilt and telescopic manual switch function does not operate | 1. Multiplex communication system | HOW TO PROCEED WITH TROUBLESHOOTING |
| 2. Tilt and telescopic manual switch circuit | TILT AND TELESCOPIC MANUAL SWITCH CIRCUIT | |
| Tilt only: Only tilt and telescopic manual switch function does not operate switch function | 1. Multiplex communication system | HOW TO PROCEED WITH TROUBLESHOOTING |
| 2. Tilt and telescopic manual switch circuit | TILT AND TELESCOPIC MANUAL SWITCH CIRCUIT | |
| Telescopic only: Only tilt and telescopic manual switch function does not operate | 1. Multiplex communication system | HOW TO PROCEED WITH TROUBLESHOOTING |
| 2. Tilt and telescopic manual switch circuit | TILT AND TELESCOPIC MANUAL SWITCH CIRCUIT | |
| Both away and return: Only auto away / return function does not operate | 1. Check status of auto away function using intelligent tester | - |
| 2. Multiplex communication system | HOW TO PROCEED WITH TROUBLESHOOTING | |
| 3. Ignition switch | - | |
| 4. Unlock warning switch | UNLOCK WARNING SWITCH | |
| Only away: Only Auto away / return function does not operate | 1. Multiplex communication system | HOW TO PROCEED WITH TROUBLESHOOTING |
| 2. Unlock warning switch | UNLOCK WARNING SWITCH | |
| 3. Ignition switch | - | |
| Only return: Only auto away / return function does not operate | 1. Multiplex communication system | HOW TO PROCEED WITH TROUBLESHOOTING |
| 2. Unlock warning switch | UNLOCK WARNING SWITCH | |
| 3. Ignition switch | - | |
| Only memory function does not operate | 1. Multiplex communication system | HOW TO PROCEED WITH TROUBLESHOOTING |